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