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