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