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)(17,18,22,24,21,26,20,25)(19,23,29,32,27,31,28,30)(2,7)(4,5)(8,14)(9,10)(11,12)(15,16)(17,19,20,28,21,27,22,29)(18,23,25,30,26,31,24,32)(1,3,6,13)(2,8,10,16)(4,11,5,12)(7,14,9,15)(18,24)(19,27)(20,22)(23,30)(25,26)(31,32)(1,4)(3,11)(5,6)(7,9)(12,13)(14,15) 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.