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