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