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