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