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