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