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