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