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