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