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