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)(19,28)(20,31)(21,26)(22,25)(23,27)(24,29)(30,32)(1,3,5,4)(2,6,7,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,20)(18,24,27,32)(21,29,22,30)(25,28,26,31)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(17,20,23,19)(18,24,27,32)(21,30,22,29)(25,28,26,31)(9,11)(10,14)(12,15)(13,16)(17,21,23,22)(18,25,27,26)(19,29,20,30)(24,28,32,31)(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.