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)(12,13)(15,16)(17,18)(19,20)(21,25)(22,30)(23,24)(26,31)(27,32)(28,29)(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)(4,7,13,12)(10,15,16,14)(18,24)(20,25)(26,30)(28,32)(33,34)(35,42)(36,39)(37,40)(38,41)(43,48)(44,46)(45,47)(17,19,23,21)(18,25,24,20)(22,27,31,29)(26,32,30,28)(33,35,39,37)(34,40,36,42)(38,43,46,45)(41,47,44,48)(1,3,5,11)(2,6,8,9)(4,10,13,16)(7,14,12,15)(17,20,23,25)(18,19,24,21)(22,28,31,32)(26,27,30,29)(33,36,39,34)(35,40,37,42)(38,44,46,41)(43,47,45,48)(1,2)(3,6)(4,12)(5,8)(7,13)(9,11)(10,15)(14,16)(17,21,23,19)(18,25,24,20)(22,27,31,29)(26,28,30,32)(33,37,39,35)(34,40,36,42)(38,43,46,45)(41,48,44,47)(1,4,5,13)(2,7,8,12)(3,10,11,16)(6,14,9,15)(17,22,23,31)(18,26,24,30)(19,27,21,29)(20,28,25,32)(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.