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