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