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