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