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