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