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