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