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)(19,23)(20,22)(21,24)(25,28)(26,31)(27,29)(30,32)(1,3)(2,6)(4,10)(5,11)(7,9)(8,13)(12,16)(14,15)(18,22)(20,28)(23,29)(24,25)(27,32)(30,31) involution — undirected(4,12)(8,14)(10,16)(13,15)(17,19)(18,23)(20,27)(21,26)(22,29)(24,31)(25,30)(28,32) involution — undirected(2,7)(6,9)(8,14)(13,15)(18,24)(19,26)(22,25)(27,32) involution — undirected(1,4,5,12)(2,8,7,14)(3,10,11,16)(6,13,9,15)(18,24)(19,26)(22,25)(27,32)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.