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