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