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