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