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