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