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