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