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