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