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