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