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