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