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