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)(17,18,23,24)(19,21,26,22)(20,25,28,31)(27,30,32,29)(9,10)(11,16)(12,14)(13,15)(17,19,22,18,23,26,21,24)(20,27,29,25,28,32,30,31)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(18,24)(19,26)(20,28)(29,30)(10,15)(14,16)(17,20)(18,25)(19,27)(21,30)(22,29)(23,28)(24,31)(26,32) involution — undirected(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,14,15,16)(17,21,23,22)(18,19,24,26)(20,29,28,30)(25,32,31,27)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.