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