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