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