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