One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,8,4,6)(17,18,22,26)(19,27,29,24)(20,23,30,32)(21,31,28,25)(1,3,5,4)(2,6,7,8)(9,10)(11,14)(12,13)(15,16)(17,19,28,30,22,29,21,20)(18,23,31,24,26,32,25,27)(10,13)(14,16)(17,20,21,29,22,30,28,19)(18,24,25,23,26,27,31,32)(1,4,5,3)(2,6,7,8)(9,11)(10,14)(12,15)(13,16)(19,29)(20,30)(23,32)(24,27)(11,15)(14,16) involution — undirectedA 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.