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