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