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