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