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