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