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