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