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