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