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