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