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