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