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