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