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