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