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