One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,10)(4,12)(5,7)(6,8)(9,13)(11,15)(14,16)(20,28)(24,29)(26,32)(30,31)(33,34)(35,42)(36,39)(37,44)(38,41)(40,46)(43,45)(47,48) involution — undirected(1,3,7,6)(2,8,5,10)(4,11,13,14)(9,15,12,16)(17,18)(19,23)(20,29)(21,25)(22,27)(24,28)(26,30)(31,32)(34,36)(35,41)(40,44)(43,47)(17,19)(18,22)(20,26)(21,27)(23,25)(24,30)(28,32)(29,31)(33,35)(34,38)(36,42)(37,43)(39,41)(40,45)(44,48)(46,47) involution — undirected(1,4)(2,9)(3,11)(5,12)(6,14)(7,13)(8,15)(10,16)(17,19)(18,23)(20,26)(21,27)(22,25)(24,31)(28,32)(29,30)(33,36,39,34)(35,42,41,38)(37,44,46,40)(43,48,47,45)(1,5,7,2)(3,8,6,10)(4,12,13,9)(11,15,14,16)(17,20)(18,24)(19,26)(21,28)(22,30)(23,31)(25,29)(27,32)(33,37)(34,40)(35,43)(36,44)(38,45)(39,46)(41,47)(42,48)(1,6,7,3)(2,8,5,10)(4,11,13,14)(9,16,12,15)(17,18)(19,22)(20,24)(21,25)(23,27)(26,30)(28,29)(31,32)(33,38,39,42)(34,41,36,35)(37,45,46,48)(40,47,44,43)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.