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