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