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