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