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