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