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