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