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