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