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