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