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