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