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