One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4)(5,7)(6,8)(9,10)(11,12)(13,17)(14,16)(15,18)(19,20,23,24)(21,27,29,25)(22,26,31,32)(28,30,34,33)(3,5,7,4)(6,9,10,8)(11,13,14,18)(12,15,16,17)(19,21,23,29)(20,25,24,27)(22,30,31,33)(26,28,32,34)(3,6,7,10)(4,8,5,9)(12,16)(15,17)(19,22,23,31)(20,26,24,32)(21,28,29,34)(25,33,27,30)(4,5)(8,9)(13,18)(15,17)(19,20,23,24)(21,27,29,25)(22,26,31,32)(28,30,34,33)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.