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