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