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)(11,15)(12,14)(13,16)(17,18,23,27)(19,22,26,30)(20,28,31,25)(21,24,32,29)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,22)(20,29)(21,28)(23,26)(24,31)(25,32)(27,30) involution — undirected(10,14)(11,16)(17,20,30,32,23,31,22,21)(18,24,26,25,27,29,19,28)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,22,31,23,32,30,20)(18,25,19,24,27,28,26,29)(2,5)(6,8)(10,14)(13,15)(17,22,23,30)(18,26,27,19)(20,21,31,32)(24,25,29,28)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.