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