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