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