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