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