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