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