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