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