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