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)(17,18,22,23)(19,21,26,24)(20,28,30,25)(27,31,32,29)(33,34,39,44)(35,40,47,46)(36,43,38,41)(37,42,45,48)(2,6)(4,12)(7,9)(11,16)(18,23)(21,24)(25,28)(29,31)(33,35)(34,40)(36,37)(38,45)(39,47)(41,48)(42,43)(44,46) involution — undirected(3,10)(7,9)(11,16)(14,15)(18,23)(19,26)(25,28)(27,32)(33,36,39,38)(34,41,44,43)(35,45,47,37)(40,42,46,48)(1,3,5,10)(2,7,6,9)(4,11,12,16)(8,14,13,15)(17,19)(18,24)(20,27)(21,23)(22,26)(25,31)(28,29)(30,32)(33,37,39,45)(34,42,44,48)(35,36,47,38)(40,43,46,41)(1,2)(3,7)(4,8)(5,6)(9,10)(11,14)(12,13)(15,16)(17,20)(18,25)(19,27)(21,29)(22,30)(23,28)(24,31)(26,32)(33,38,39,36)(34,43,44,41)(35,45,47,37)(40,42,46,48)(1,4,5,12)(2,8,6,13)(3,11,10,16)(7,14,9,15)(17,21,22,24)(18,19,23,26)(20,29,30,31)(25,27,28,32)(33,34)(35,46)(36,41)(37,42)(38,43)(39,44)(40,47)(45,48)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.