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