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