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