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