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