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