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