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