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