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