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