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