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