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