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