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