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