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