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