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