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