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