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