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