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