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