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