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