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