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