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