One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,9,11,7)(4,8,12,13)(10,15,16,14)(17,18,22,26)(19,23,24,20)(21,29,30,25)(27,28,32,31)(36,44)(40,45)(42,48)(46,47)(2,6)(7,9)(8,13)(14,15)(17,19)(18,23)(20,26)(21,27)(22,24)(25,31)(28,29)(30,32)(34,38)(39,41)(40,45)(46,47) involution — undirected(1,2)(3,7)(4,8)(5,6)(9,11)(10,14)(12,13)(15,16)(17,20,22,23)(18,24,26,19)(21,28,30,31)(25,32,29,27)(33,34)(35,41)(36,40)(37,38)(39,43)(42,47)(44,45)(46,48)(1,2)(3,7)(4,8)(5,6)(9,11)(10,14)(12,13)(15,16)(17,20)(18,19)(21,28)(22,23)(24,26)(25,27)(29,32)(30,31)(33,35,37,43)(34,39,38,41)(36,42,44,48)(40,46,45,47)(1,3,5,11)(2,7,6,9)(4,10,12,16)(8,14,13,15)(17,21,22,30)(18,25,26,29)(19,27,24,32)(20,28,23,31)(1,4,5,12)(2,8,6,13)(3,10,11,16)(7,14,9,15)(17,19)(18,20)(21,27)(22,24)(23,26)(25,28)(29,31)(30,32)(33,36)(34,40)(35,42)(37,44)(38,45)(39,46)(41,47)(43,48)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.