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