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