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