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