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