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