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