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