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