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)(11,15)(12,14)(13,16)(17,18)(19,24)(20,26)(21,27)(22,28)(23,29)(25,32)(30,38)(31,39)(33,42)(34,43)(35,44)(36,41)(37,45)(40,47)(46,48) involution — undirected(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,32)(18,24,28,25)(20,33,35,46)(21,31,23,36)(26,42,44,48)(27,39,29,41)(30,37,47,34)(38,45,40,43)(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,19)(18,25)(20,30)(21,36)(22,32)(23,31)(24,28)(26,40)(27,39)(29,41)(33,34)(35,47)(37,46)(38,44)(42,45)(43,48)(10,14)(13,15)(17,20,22,35)(18,26,28,44)(19,30,32,47)(21,34,23,37)(24,38,25,40)(27,43,29,45)(31,46,36,33)(39,48,41,42)(1,4,5,3)(2,7,6,8)(10,14)(13,15)(17,21,22,23)(18,27,28,29)(19,31,32,36)(20,34,35,37)(24,39,25,41)(26,43,44,45)(30,46,47,33)(38,48,40,42)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.