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