One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(6,10)(8,11)(12,16)(13,17)(15,18)(19,20)(21,22)(23,29)(24,32)(25,27)(26,30)(28,33)(31,35)(34,36) involution — undirected(5,6,11,17,9,13,8,10)(7,12,18,20,14,19,15,16)(5,7)(6,12)(8,15)(9,14)(10,16)(11,18)(13,19)(17,20)(21,23,24,30,25,31,33,36)(22,26,28,29,27,34,32,35)(1,2,3,4)(7,14)(12,19)(15,18)(16,20)(22,27)(26,34)(28,32)(29,35)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.