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