One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,12)(7,10)(9,13)(11,14)(15,16)(20,28)(24,31)(26,32)(29,30)(33,34,38,42)(35,41,37,39)(36,44,45,40)(43,47,46,48)(3,10)(7,8)(11,16)(14,15)(17,18)(19,23)(20,24)(21,25)(22,27)(26,30)(28,31)(29,32)(33,34)(35,39)(36,44)(37,41)(38,42)(40,45)(43,48)(46,47) involution — undirected(1,3)(2,7)(4,8)(5,11)(6,10)(9,14)(12,15)(13,16)(17,19)(18,22)(20,26)(21,27)(23,25)(24,29)(28,32)(30,31)(33,35,38,37)(34,39,42,41)(36,43,45,46)(40,47,44,48)(1,3)(2,8)(4,7)(5,11)(6,10)(9,15)(12,14)(13,16)(17,19)(18,23)(20,26)(21,27)(22,25)(24,30)(28,32)(29,31)(33,36)(34,40)(35,43)(37,46)(38,45)(39,47)(41,48)(42,44) involution — undirected(1,4,6,2)(3,8,10,7)(5,12,13,9)(11,15,16,14)(17,18)(19,22)(20,24)(21,25)(23,27)(26,29)(28,31)(30,32)(33,37,38,35)(34,41,42,39)(36,43,45,46)(40,47,44,48)(1,5,6,13)(2,9,4,12)(3,11,10,16)(7,14,8,15)(17,20)(18,24)(19,26)(21,28)(22,29)(23,30)(25,31)(27,32)(33,34)(35,39)(36,40)(37,41)(38,42)(43,47)(44,45)(46,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.