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