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