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