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