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