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