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