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