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