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)(12,16)(13,14)(18,22)(19,25)(20,27)(24,28)(26,29)(30,32) involution — undirected(2,6)(7,8)(10,14)(11,12)(17,18,21,24)(19,23,26,31)(20,28,27,22)(25,30,29,32)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,19,21,26)(18,23,24,31)(20,29,27,25)(22,30,28,32)(1,4,5,3)(2,8,6,7)(11,12)(15,16)(18,24)(22,28)(23,31)(30,32)(9,12,13,11)(10,16,14,15)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.