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