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