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